ISSN:
1572-8838
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Electrical Engineering, Measurement and Control Technology
Notes:
Abstract The voltammetric responses of iron in boric acid-borate buffer solutions in the 7.5–9.2 pH range and 0–75°C range show two different and successive stages related to passivation. The first electro-oxidation stage leading to passivity onset corresponds to Fe(OH)2 electroformation. The second stage corresponds to the growth and second level electro-oxidation of the prepassive layer. A reaction mechanism accounting for the electroformation and electroreduction of the Fe(OH)2 layer is discussed. A duplex passive layer structure involving an inner layer with a Fe3O4 limiting structure at high positive potential and an outer hydrous iron oxy-hydroxide layer seems adequate for understanding the experimental data.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01006844
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